CN108871307A - The automatic direct-coupling device of Y waveguide chip based on image recognition and optical power feedback - Google Patents

The automatic direct-coupling device of Y waveguide chip based on image recognition and optical power feedback Download PDF

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CN108871307A
CN108871307A CN201810378920.5A CN201810378920A CN108871307A CN 108871307 A CN108871307 A CN 108871307A CN 201810378920 A CN201810378920 A CN 201810378920A CN 108871307 A CN108871307 A CN 108871307A
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武立勇
宋凝芳
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Beihang University
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    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58Turn-sensitive devices without moving masses
    • G01C19/64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/72Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
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Abstract

本发明是一种基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置,属于光纤传感技术领域。本装置主要包括光路单元、图像采集单元、运动执行单元和图像处理与控制单元。图像采集单元包括直角棱镜、三个相机和三个LED;运动执行单元包括Y波导固定机构、架设相机的电动台、控制输入端、前输出端和后输出端姿态的六维电动台,以及运动控制器。图像处理与控制单元先根据相机采集的图像调整输入端、前输出端和后输出端的位姿,再根据光功率计测量的环形器返回的光功率值精调耦合点。本发明避免了光纤陀螺内部两个熔接点,简化了光纤陀螺制作工艺,减小了光纤熔接引入的背向反射和偏振串音,提高了光纤陀螺测量精度、寿命和质量。

The invention is an automatic direct coupling device for a Y waveguide chip based on image recognition and optical power feedback, which belongs to the technical field of optical fiber sensing. The device mainly includes an optical path unit, an image acquisition unit, a motion execution unit, and an image processing and control unit. The image acquisition unit includes a right-angle prism, three cameras and three LEDs; the motion execution unit includes a Y waveguide fixing mechanism, an electric stage for erecting the camera, a six-dimensional electric stage for controlling the attitude of the input end, the front output end and the rear output end, and the movement controller. The image processing and control unit first adjusts the poses of the input terminal, the front output terminal and the rear output terminal according to the images collected by the camera, and then fine-tunes the coupling point according to the optical power value returned by the circulator measured by the optical power meter. The invention avoids two welding points inside the fiber optic gyroscope, simplifies the manufacturing process of the fiber optic gyroscope, reduces back reflection and polarization crosstalk introduced by fiber optic welding, and improves the measurement accuracy, service life and quality of the fiber optic gyroscope.

Description

基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置Automatic direct coupling device for Y waveguide chip based on image recognition and optical power feedback

技术领域technical field

本发明涉及一种基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置,属于光纤传感技术领域。The invention relates to an automatic direct coupling device for a Y waveguide chip based on image recognition and optical power feedback, belonging to the technical field of optical fiber sensing.

背景技术Background technique

集成光学技术起源于二十世纪八十年代初,受启发于集成电路,把多个光学分离器件集成在同一芯片上,减小系统的体积和重量,提高系统可靠性。经过近三十年的研发,集成光学器件在国外已进入产业化阶段,代表产品有光强度调制器和用于光纤陀螺的Y波导集成光学器件。Integrated optics technology originated in the early 1980s. Inspired by integrated circuits, multiple optical separation devices are integrated on the same chip to reduce the volume and weight of the system and improve system reliability. After nearly 30 years of research and development, integrated optical devices have entered the stage of industrialization abroad, and representative products include light intensity modulators and Y-waveguide integrated optical devices for fiber optic gyroscopes.

光纤陀螺仪是基于萨格纳克效应的角速率传感器,是光纤传感领域最重要的成就之一。由于其体积小、精度覆盖范围大、可靠性高等优点,已成为惯性技术中的重要器件,并且广泛应用于各种飞行器、舰船、定位定向以及地质、石油勘探等领域。Fiber optic gyroscopes are angular rate sensors based on the Sagnac effect and are one of the most important achievements in the field of fiber optic sensing. Due to its small size, large precision coverage, high reliability and other advantages, it has become an important device in inertial technology, and is widely used in various aircraft, ships, positioning and orientation, geology, oil exploration and other fields.

目前,光纤陀螺普遍采用宽谱光源、Y波导芯片和保偏光纤环方案。其目前成熟的制作技术为:首先将Y波导芯片的入光点、前出光点、后出光点分别与辅助输入端尾纤、前输出端、后输出端进行耦合。在耦合过程中通过向输入端注入光照,监测输出端光功率实现耦合质量监测,当耦合质量达到光纤陀螺制作要求后,固化耦合点;然后使用保偏光纤熔接机熔接辅助尾纤与光纤环。At present, fiber optic gyroscopes generally use broadband light sources, Y-waveguide chips and polarization-maintaining fiber ring solutions. The current mature production technology is as follows: first, the light entrance point, front light exit point, and rear light exit point of the Y waveguide chip are respectively coupled with the pigtail of the auxiliary input end, the front output end, and the rear output end. During the coupling process, by injecting light into the input end and monitoring the optical power at the output end, the coupling quality monitoring is realized. When the coupling quality meets the requirements of the fiber optic gyroscope, the coupling point is solidified; then the auxiliary pigtail and the optical fiber ring are fused using a polarization-maintaining optical fiber fusion splicer.

前述的现有技术存在的问题有:首先,光纤环与辅助尾纤熔接时,由于光路闭合,无法对熔接质量进行监测,导致辅助尾纤与光纤环之间的熔接点极易由于端面反射及偏振交叉耦合引入背向反射和偏振串音,同时引入熔接损耗,造成信噪比下降,最终导致光纤陀螺的精度降低;其次,由于上述熔接点连接处无硬件结构为其提供保护和支撑,连接处容易发生断裂,导致光纤陀螺的寿命和质量大幅降低;另外,前述的光纤陀螺制作过程中还存在需要对光纤进行多次连接操作的问题,导致光纤陀螺生产过程复杂,增加了制作成本。The problems in the aforementioned prior art are as follows: firstly, when the optical fiber ring and the auxiliary pigtail are fused, the fusion quality cannot be monitored due to the closed optical path, resulting in that the fusion point between the auxiliary pigtail and the optical fiber ring is very easy to be caused by end face reflection and Polarization cross-coupling introduces back reflection and polarization crosstalk, and at the same time introduces splicing loss, resulting in a decrease in the signal-to-noise ratio, which ultimately leads to a decrease in the accuracy of the fiber optic gyroscope; The fiber optic gyroscope is prone to breakage, which greatly reduces the life and quality of the fiber optic gyroscope. In addition, the fiber optic gyroscope needs to be connected multiple times during the production process of the fiber optic gyroscope, which makes the production process of the fiber optic gyroscope complicated and increases the production cost.

公开号为CN 102927979A的中国专利申请在2013年2月13日公开了一种光纤陀螺及其制作过程中在线检测光纤耦合质量的方法。其中,为了实现Y波导与光纤环直接对接耦合,还在Y波导芯片内、位于Y波导两侧各设置有一条直波导作为辅助波导,可借由检测尾纤和直波导之间的耦合质量来反应Y波导和光纤环之间的耦合质量。但是此方案存在以下问题:光纤耦合质量严重依赖于直波导的加工技术,若直波导存在加工偏差,直波导的耦合质量不能精确反映光纤环和Y波导的耦合质量;该方案未涉及自动耦合技术,耦合精度受限于人力操作水平,可靠性差。The Chinese patent application with the publication number CN 102927979A disclosed on February 13, 2013 a fiber optic gyroscope and a method for online detection of fiber coupling quality during its manufacture. Among them, in order to realize the direct butt coupling between the Y waveguide and the fiber ring, a straight waveguide is provided in the Y waveguide chip and located on both sides of the Y waveguide as an auxiliary waveguide, which can be detected by detecting the coupling quality between the pigtail and the straight waveguide. Reflects the coupling quality between the Y waveguide and the fiber ring. However, this solution has the following problems: the fiber coupling quality is heavily dependent on the processing technology of the straight waveguide. If there is a processing deviation in the straight waveguide, the coupling quality of the straight waveguide cannot accurately reflect the coupling quality of the fiber ring and the Y waveguide; this solution does not involve automatic coupling technology , the coupling accuracy is limited by the level of human operation, and the reliability is poor.

发明内容Contents of the invention

为了解决现有制作光纤陀螺时存在生产过程复杂的问题,并进一步提高光纤陀螺测量精度和光路可靠性,本发明提出一种基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置,采用图像识别方法可以快速准确实现Y波导芯片、保偏光纤六维姿态实时测量,采用光功率计反馈方法可以在线获取耦合器返回光功率大小,根据姿态信息和光功率信息调整输入端、前输出端、后输出端位置,实现与Y波导芯片入光点、前出光点、后出光点的精密耦合。In order to solve the problem of complex production process existing in the production of fiber optic gyroscopes and further improve the measurement accuracy and optical path reliability of fiber optic gyroscopes, this invention proposes an automatic direct coupling device for Y waveguide chips based on image recognition and optical power feedback. The identification method can quickly and accurately realize the real-time measurement of the six-dimensional attitude of the Y waveguide chip and the polarization-maintaining fiber. The optical power meter feedback method can be used to obtain the optical power returned by the coupler online, and adjust the input terminal, front output terminal, and rear terminal according to the attitude information and optical power information. The position of the output end realizes precise coupling with the light entrance point, front light exit point, and rear light exit point of the Y waveguide chip.

本发明提供的一种基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置,包括光路单元、图像采集单元、运动执行单元和图像处理与控制单元。The invention provides an automatic direct coupling device for Y-waveguide chips based on image recognition and optical power feedback, which includes an optical path unit, an image acquisition unit, a motion execution unit, and an image processing and control unit.

所述的光路单元中包括待耦合的Y波导芯片、输入端、前输出端、后输出端和光纤环,并设置光功率计测量输入端返回的光功率大小。The optical path unit includes a Y waveguide chip to be coupled, an input end, a front output end, a rear output end and an optical fiber ring, and an optical power meter is set to measure the optical power returned by the input end.

所述的运动执行单元包括:用于固定Y波导芯片的Y波导固定机构,架设左相机的一维电动台,架设右相机的二维电动台,架设后相机的三维电动台,分别控制输入端、前输出端和后输出端姿态的三个六维电动台,以及运动控制器。运动控制器向一维电动台、二维电动台、三维电动台以及三个六维电动台发送姿态控制信号。The motion execution unit includes: a Y waveguide fixing mechanism for fixing the Y waveguide chip, a one-dimensional electric platform for the left camera, a two-dimensional electric platform for the right camera, and a three-dimensional electric platform for the rear camera, respectively controlling the input terminals , three six-dimensional electric tables for the attitude of the front output end and the rear output end, and a motion controller. The motion controller sends attitude control signals to the one-dimensional electric stage, the two-dimensional electric stage, the three-dimensional electric stage and the three six-dimensional electric stages.

所述的运动控制器包括可编程逻辑控制器和步进梯形程序。运动控制器采用分时复用技术,将6个电动台的24轴电机分为四组,每组控制6个维度,利用可编程逻辑控制器的6路脉冲接口控制6个维度。步进梯形程序包括指令的接收、指令的理解、缓冲区状态识别、脉冲输出和脉冲输出状态监控。The motion controller includes a programmable logic controller and a step ladder program. The motion controller adopts time-division multiplexing technology to divide the 24-axis motors of the 6 electric tables into four groups, each group controls 6 dimensions, and uses the 6-channel pulse interface of the programmable logic controller to control 6 dimensions. The stepping ladder program includes instruction receiving, instruction understanding, buffer state recognition, pulse output and pulse output state monitoring.

所述的图像采集单元包括直角棱镜、三个相机、三个LED和网络交换机;三个相机分别位于Y波导芯片的左侧、右侧和后侧,并且均水平放置,分别标记为左相机、右相机和后相机;三个LED分别以与光纤轴线成30度方向角斜照射输入端、前输出端和后输出端;直角棱镜安装于Y波导固定机构的上盖底面;网络交换机用于三个相机与台式计算机之间图像传输;The image acquisition unit includes a right-angle prism, three cameras, three LEDs and a network switch; the three cameras are respectively located on the left, right and rear sides of the Y waveguide chip, and are placed horizontally, and are respectively marked as left camera, The right camera and the rear camera; three LEDs illuminate the input end, the front output end and the rear output end obliquely at a direction angle of 30 degrees to the optical fiber axis; Image transfer between a camera and a desktop computer;

所述的图像采集单元,在打开三个LED时,左相机采集前输出端和后输出端的端面图像,右相机采集输入端的端面图像和Y波导芯片的出光点上棱图像,在关闭三个LED,打开红光光源时,右相机采集Y波导芯片的前出光点和后出光点图像。所述的后相机在三维电动台的带动下,采集输入端、Y波导芯片、前输出端和后输出端的后视图像以及由直角棱镜反射的顶视图像。In the image acquisition unit, when the three LEDs are turned on, the left camera collects the end face images of the front output end and the rear output end, the right camera collects the end face images of the input end and the upper edge image of the light exit point of the Y waveguide chip, and when the three LEDs are turned off , when the red light source is turned on, the right camera captures the images of the front light-emitting point and the rear light-emitting point of the Y waveguide chip. Driven by the three-dimensional electric platform, the rear camera collects the rear view images of the input terminal, the Y waveguide chip, the front output terminal and the rear output terminal, and the top view image reflected by the rectangular prism.

所述的图像处理与控制单元包括计算机及直接耦合程序。所述的计算机连接三个相机、光功率计和运动控制器。所述的直接耦合程序包括:提取Y波导芯片、输入端、前输出端和后输出端的三维角度和三维位置,将控制三个六维电动台运动的指令输出给运动控制器;在利用相机采集的图像调整输入端、前输出端和后输出端的姿态后,根据光功率计的测量值调节输入端、前输出端和后输出端获取最终的耦合点。The image processing and control unit includes a computer and a direct coupling program. The computer is connected with three cameras, an optical power meter and a motion controller. The direct coupling program includes: extracting the three-dimensional angle and the three-dimensional position of the Y-waveguide chip, the input terminal, the front output terminal and the rear output terminal, and outputting the commands for controlling the motion of the three six-dimensional electric stages to the motion controller; After adjusting the attitude of the input terminal, front output terminal and rear output terminal, adjust the input terminal, front output terminal and rear output terminal according to the measurement value of the optical power meter to obtain the final coupling point.

所述的图像处理与控制单元由图像处理方法完成输入端、前输出端、后输出端三维角度调节和左右位置调节,上下位置和前后位置初步调节;由光功率计输出功率大小,按照从前到后、从上到下的顺序在边长6um矩形框内,以50nm步距依次调节输入端、前输出端和后输出端,找到功率数值最大时对应的输入端、前输出端和后输出端的位置,作为最终的耦合点。The image processing and control unit uses the image processing method to complete the three-dimensional angle adjustment and left-right position adjustment of the input end, the front output end, and the rear output end, and the preliminary adjustment of the up-down position and the front-back position; The order from top to bottom is within the rectangular box with a side length of 6um. Adjust the input terminal, front output terminal and rear output terminal in sequence with a step distance of 50nm, and find the corresponding input terminal, front output terminal and rear output terminal when the power value is the largest. position, as the final coupling point.

相对于现有技术,本发明的优点和积极效果在于:Compared with prior art, advantage and positive effect of the present invention are:

(1)本发明提供的基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置,避免了光纤陀螺内部两个熔接点,简化了光纤陀螺制作工艺,提高了光纤陀螺内部光纤的机械性能;避免光纤熔接引入背向反射和偏振串音对光纤陀螺测量精度的影响;同时提高光纤陀螺的寿命和质量。(1) The Y waveguide chip automatic direct coupling device based on image recognition and optical power feedback provided by the present invention avoids two welding points inside the fiber optic gyroscope, simplifies the manufacturing process of the fiber optic gyroscope, and improves the mechanical properties of the optical fiber inside the fiber optic gyroscope; Avoid the influence of back reflection and polarization crosstalk introduced by fiber fusion on the measurement accuracy of fiber optic gyroscope; at the same time, improve the life and quality of fiber optic gyroscope.

(2)本发明采用图像处理方法获取光纤和Y波导芯片六维位姿信息,合理选用光学放大镜头,使得装置既能满足测量精度要求,实现光纤和Y波导芯片精确对准,又具有足够大的测量范围,降低装置对光纤初始安装精度要求。装置采用后相机俯视图像、后视图像,左相机图像,右相机图像四个视角识别姿态,利用信息的冗余提高了装置运行的鲁棒性。(2) The present invention adopts the image processing method to obtain the six-dimensional pose information of the optical fiber and the Y waveguide chip, and reasonably selects the optical magnifying lens, so that the device can meet the measurement accuracy requirements, realize the precise alignment of the optical fiber and the Y waveguide chip, and have a large enough The measurement range reduces the device's requirements for the initial installation accuracy of the optical fiber. The device adopts the four angles of view of the rear camera overlooking the image, the rear view image, the left camera image, and the right camera image to recognize the posture, and the use of information redundancy improves the robustness of the device operation.

(3)本发明利用两个输出端与Y波导芯片形成回路,将光功率计置于环形器返回端监测光功率变化,解决了Y波导芯片与光纤环之间无监测点的问题,通过返回的光功率值可以单独精确调节输入端、前输出端与后输出端的上下前后位置,保证耦合质量。(3) The present invention utilizes two output terminals and the Y waveguide chip to form a loop, and the optical power meter is placed at the return end of the circulator to monitor the change of the optical power, which solves the problem that there is no monitoring point between the Y waveguide chip and the optical fiber ring. The optical power value can independently and accurately adjust the up and down positions of the input terminal, front output terminal and rear output terminal to ensure the coupling quality.

(4)本发明在Y波导芯片顶盖底面安装直角棱镜,通过调节后相机上下位置,自主选择是否选用直角棱镜切换相机视角,实现了一个相机观测后视图和俯视图的功能,减少相机个数,减小了直接耦合装置体积,同时降低了成本。(4) The present invention installs a right-angle prism on the bottom surface of the top cover of the Y-waveguide chip. By adjusting the up and down positions of the rear camera, it is independently selected whether to select the right-angle prism to switch the camera angle of view, realizing the function of one camera observing the rear view and the top view, and reducing the number of cameras. The volume of the direct coupling device is reduced, and the cost is reduced at the same time.

(5)本发明使用PLC作为运动控制器,抗电磁干扰强,使得装置直接耦合运行更加稳定;采用分时复用技术利用PLC六路脉冲接口实现24轴电机控制,避免了多个PLC的使用,节省了直接耦合装置的体积。(5) The present invention uses PLC as motion controller, and anti-electromagnetic interference is strong, makes the direct coupling operation of device more stable; Adopts time-division multiplexing technology to utilize PLC six-way pulse interface to realize 24 axis motor control, has avoided the use of a plurality of PLCs, The volume of the direct coupling device is saved.

附图说明Description of drawings

图1是本发明基于图像识别与光功率反馈的Y波导芯片自动直接耦合装置整体结构示意图;Fig. 1 is a schematic diagram of the overall structure of the Y-waveguide chip automatic direct coupling device based on image recognition and optical power feedback in the present invention;

图2是本发明中运动执行单元中运动控制器的步进梯形程序流程图;Fig. 2 is the step-by-step ladder program flow chart of the motion controller in the motion execution unit in the present invention;

图3是本发明中图像处理与控制单元中图像识别待提取图像特征的示意图;3 is a schematic diagram of image features to be extracted for image recognition in the image processing and control unit of the present invention;

图4是本发明中图像处理与控制单元中直线特征提取算法的流程图;Fig. 4 is the flow chart of straight line feature extraction algorithm in image processing and control unit in the present invention;

图5是本发明中图像处理与控制单元中圆形特征提取算法的流程图。Fig. 5 is a flow chart of the circular feature extraction algorithm in the image processing and control unit of the present invention.

图中:In the picture:

1-宽谱光源;2-红光光源;3-第一环形器;4-第二环形器;5-输入端;6-Y波导芯片;1-broad-spectrum light source; 2-red light source; 3-first circulator; 4-second circulator; 5-input terminal; 6-Y waveguide chip;

7-前输出端;8-后输出端;9-光纤环;10-直角棱镜;11-左相机;12-右相机;13-后相机;7-front output port; 8-rear output port; 9-fiber ring; 10-rectangular prism; 11-left camera; 12-right camera; 13-rear camera;

14-第一LED;15-第二LED;16-第三LED;17-第一六维电动台;18-第二六维电动台;14-the first LED; 15-the second LED; 16-the third LED; 17-the first six-dimensional electric platform; 18-the second six-dimensional electric platform;

19-第三六维电动台;20-一维电动台;21-二维电动台;22-三维电动台;23-Y波导固定机构;19-Third and six-dimensional electric stage; 20-One-dimensional electric stage; 21-Two-dimensional electric stage; 22-Three-dimensional electric stage; 23-Y waveguide fixing mechanism;

24-运动控制器;25-台式计算机;26-光功率计;27-网络交换机。24-motion controller; 25-desktop computer; 26-optical power meter; 27-network switch.

具体实施方式Detailed ways

下面将结合附图和实施例对本发明作进一步的详细说明。The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

如图1所示,本发明提供的一种Y波导芯片与保偏光纤环直接耦合装置,包括:光路单元、图像采集单元、运动执行单元、图像处理与控制单元和人机交互单元。As shown in FIG. 1 , the present invention provides a direct coupling device between a Y-waveguide chip and a polarization-maintaining fiber ring, including: an optical path unit, an image acquisition unit, a motion execution unit, an image processing and control unit, and a human-computer interaction unit.

光路单元包含宽谱光源(SLD)1、红光光源2、第一环形器3、第二环形器4、输入端5、Y波导芯片6、前输出端7、后输出端8和光纤环9,为实施本发明的作用对象。光路单元还包括光功率计26。第一环形器3和第二环形器4包括环形器输入端、输出端和返回端。宽谱光源1与第一环形器3输入端相连,红光光源2与第一环形器3返回端相连,第一环形器3的应用可以实现宽谱光源1和红光光源2的在线切换。第二环形器4输入端连接第一环形器3输出端,输出端接在输入端5上。输入端5为带有铌酸锂小块的光纤尾纤,前输出端7和后输出端8分别为光纤环9的两端尾纤,并在两端尾纤分别粘接在铌酸锂小块上。本发明的目的是调整输入端5、前输出端7及后输出端8的位置,实现与Y波导芯片6的入光点、前出光点、后出光点的精密耦合。本发明装置在光路单元中,光功率计26连接在第二环形器4返回端,用于测量由输入端5返回的光功率大小。The optical path unit includes a wide-spectrum light source (SLD) 1, a red light source 2, a first circulator 3, a second circulator 4, an input end 5, a Y waveguide chip 6, a front output end 7, a rear output end 8 and an optical fiber ring 9 , for implementing the action object of the present invention. The optical path unit also includes an optical power meter 26 . The first circulator 3 and the second circulator 4 include a circulator input end, an output end and a return end. The wide-spectrum light source 1 is connected to the input end of the first circulator 3, and the red light source 2 is connected to the return end of the first circulator 3. The application of the first circulator 3 can realize online switching between the wide-spectrum light source 1 and the red light source 2. The input end of the second circulator 4 is connected to the output end of the first circulator 3 , and the output end is connected to the input end 5 . The input end 5 is an optical fiber pigtail with a small piece of lithium niobate, the front output end 7 and the rear output end 8 are respectively the two ends of the optical fiber ring 9, and the pigtails at both ends are respectively bonded to the lithium niobate small piece. on the block. The purpose of the present invention is to adjust the positions of the input terminal 5, the front output terminal 7 and the rear output terminal 8 to realize precise coupling with the light entrance point, the front light exit point and the rear light exit point of the Y waveguide chip 6. In the optical path unit of the device of the present invention, the optical power meter 26 is connected to the return end of the second circulator 4 for measuring the optical power returned by the input end 5 .

运动执行单元包括第一六维电动台17、第二六维电动台18、第三六维电动台19、一维电动台20、二维电动台21、三维电动台22、Y波导固定机构23以及运动控制器24。Y波导固定机构23用于固定Y波导芯片6,一维电动台20实现左相机11对焦,二维电动台21实现右相机12对焦与X轴平移,三维电动台22实现后相机13的三维位置控制。第一六维电动台17上安装光纤夹具夹持输入端5,控制输入端5的六维姿态,第二六维电动台18上安装光纤夹具夹持前输出端7,控制前输出端7的六维姿态,第三六维电动台19上安装光纤夹具夹持后输出端8,控制后输出端8的六维姿态。运动控制器24向一维电动台20、二维电动台21、三维电动台22、第一六维电动台17、第二六维电动台18和第三六维电动台19这些位移台,发送姿态控制信号。The motion execution unit includes a first six-dimensional electric stage 17, a second six-dimensional electric stage 18, a third six-dimensional electric stage 19, a one-dimensional electric stage 20, a two-dimensional electric stage 21, a three-dimensional electric stage 22, and a Y waveguide fixing mechanism 23 and a motion controller 24 . The Y waveguide fixing mechanism 23 is used to fix the Y waveguide chip 6, the one-dimensional motorized stage 20 realizes the focus of the left camera 11, the two-dimensional motorized stage 21 realizes the focus and X-axis translation of the right camera 12, and the three-dimensional motorized stage 22 realizes the three-dimensional position of the rear camera 13 control. An optical fiber clamp is installed on the first six-dimensional electric table 17 to clamp the input end 5 to control the six-dimensional posture of the input end 5, and an optical fiber clamp is installed on the second six-dimensional electric table 18 to clamp the front output end 7 to control the front output end 7. For the six-dimensional attitude, an optical fiber clamp is installed on the third six-dimensional electric platform 19 to clamp the rear output end 8 to control the six-dimensional attitude of the rear output end 8 . The motion controller 24 sends to the displacement platforms of the one-dimensional electric stage 20, the two-dimensional electric stage 21, the three-dimensional electric stage 22, the first six-dimensional electric stage 17, the second six-dimensional electric stage 18 and the third six-dimensional electric stage 19. Attitude control signal.

运动控制器24包括可编程逻辑控制器(PLC)和步进梯形程序。步进梯形程序包含图像处理与控制单元发送的姿态调节指令接收、位移台运动控制所需的脉冲输出和脉冲输出状态的反馈。运动控制器24采用分时复用技术将二十四轴电机控制分为四组,每组控制六个维度,按照功能需求将同时调节的位移台规划为一组,第一组包括架设左相机的一维电动台20、架设右相机的二维电动台21、架设后相机的三维电动台22;第二组为控制输入端5姿态的第一六维电动台17;第三组为控制前输出端7的第二六维电动台18;第四组为控制后输出端8的第三六维电动台19。并且分时复用技术的使用有效地减少了对运动控制器24脉冲输出接口的需求,有效的减小了运动控制器24的体积。步进梯形程序包括指令的接收、指令的理解、缓冲区状态识别、脉冲输出和脉冲输出状态监控。如图2所示,PLC首先初始化指令接收,设置指令接收缓冲区,并允许接收;接收到一组指令后存入接收缓冲区中,从接收缓冲区中读取一组指令,理解指令,输出相应数量脉冲控制对应位移台运动,监控脉冲输出状态,当输出完成后,从接收缓冲区继续读取下一组指令。当接收缓冲区满后,PLC向计算机25发送信号,暂停数据发送。The motion controller 24 includes a programmable logic controller (PLC) and a step ladder program. The stepping trapezoidal program includes image processing and the attitude adjustment instruction reception sent by the control unit, the pulse output required for the movement control of the displacement platform, and the feedback of the pulse output state. The motion controller 24 uses time-division multiplexing technology to divide the 24-axis motor control into four groups, and each group controls six dimensions. According to the functional requirements, the simultaneous adjustment of the translation stage is planned as a group. The first group includes the erection of the left camera. The one-dimensional electric platform 20 of the right camera, the two-dimensional electric platform 21 of the right camera, the three-dimensional electric platform 22 of the rear camera; the second group is the first six-dimensional electric platform 17 for controlling the posture of the input terminal 5; the third group is for controlling the front The second six-dimensional electric stage 18 of the output end 7; the fourth group is the third six-dimensional electric stage 19 of the output end 8 after control. Moreover, the use of time-division multiplexing technology effectively reduces the demand for the pulse output interface of the motion controller 24 and effectively reduces the volume of the motion controller 24 . The stepping ladder program includes instruction receiving, instruction understanding, buffer state recognition, pulse output and pulse output state monitoring. As shown in Figure 2, the PLC first initializes command reception, sets the command receiving buffer, and allows receiving; after receiving a set of commands, store them in the receiving buffer, read a set of commands from the receiving buffer, understand the command, and output The corresponding number of pulses controls the movement of the corresponding translation platform, monitors the pulse output status, and when the output is completed, continue to read the next set of instructions from the receiving buffer. When the receiving buffer is full, the PLC sends a signal to the computer 25 to suspend data transmission.

图像采集单元包括直角棱镜10、左相机11、右相机12、后相机13、第一LED(发光二极管)14、第二LED 15、第三LED16和网络交换机27。网络交换机27用于扩展网络接口,实现左相机11、右相机12、后相机13与台式计算机25之间图像传输。左相机11和右相机12采用高分辨率CCD(电荷耦合器件)相机提取输入端5端面、前输出端7端面和后输出端8端面。后相机13采用高分辨率分辨率CMOS(互补金属氧化物半导体)相机。直角棱镜10安装于Y波导固定机构23的上盖底面。第一LED14以与光纤轴线成30度角方向斜照射输入端5,第二LED15以与光纤轴线成30度角方向斜照射前输出端7,第三LED16以与光纤轴线成30度角方向斜照射后输出端8。打开三个LED14,15,16,左相机11采集前输出端7和后输出端8的端面图像,采集获得前输出端7的左视图,图像如图3中的放大区域所示,以及获得后输出端8的左视图。右相机12采集输入端5端面图像,获取输入端5的右视图和Y波导芯片的出光点上棱图像。关闭三个LED14,15,16,打开红光光源2,右相机12采集Y波导芯片6的前出光点、后出光点图像。后相机13自带光源,不需添加额外光源。后相机13在三维电动台22的带动下,上移至合适高度,同时调整三维电动台22另两个维度,采集由直角棱镜10反射的输入端5、Y波导芯片6、前输出端7、后输出端8的顶视图像,下移后相机13至合适高度,同时调整三维位移台22另两个维度,采集输入端5、Y波导芯片6、前输出端7、后输出端8的后视图像。The image acquisition unit includes a rectangular prism 10 , a left camera 11 , a right camera 12 , a rear camera 13 , a first LED (light emitting diode) 14 , a second LED 15 , a third LED 16 and a network switch 27 . The network switch 27 is used to expand the network interface to realize image transmission between the left camera 11 , the right camera 12 , the rear camera 13 and the desktop computer 25 . The left camera 11 and the right camera 12 use a high-resolution CCD (charge-coupled device) camera to extract the end face of the input end 5, the end face of the front output end 7 and the end face of the rear output end 8. The rear camera 13 adopts a high resolution CMOS (Complementary Metal Oxide Semiconductor) camera. The rectangular prism 10 is mounted on the bottom surface of the upper cover of the Y waveguide fixing mechanism 23 . The first LED14 irradiates the input end 5 at an angle of 30 degrees to the axis of the fiber, the second LED15 irradiates the front output end 7 at an angle of 30 degrees to the axis of the fiber, and the third LED16 irradiates the output end 7 at an angle of 30 degrees to the axis of the fiber. Output terminal 8 after irradiation. Turn on the three LEDs 14, 15, 16, and the left camera 11 collects the end face images of the front output end 7 and the rear output end 8, and collects the left view of the front output end 7. The image is shown in the enlarged area in Figure 3, and the obtained rear Left view of output 8. The right camera 12 collects the end face image of the input end 5, and acquires the right view of the input end 5 and the upper edge image of the light exit point of the Y waveguide chip. Turn off the three LEDs 14, 15, 16, turn on the red light source 2, and the right camera 12 collects the images of the front light-emitting point and the rear light-emitting point of the Y waveguide chip 6. The rear camera 13 has its own light source, and no additional light source needs to be added. Driven by the three-dimensional electric stage 22, the rear camera 13 moves up to a suitable height, and simultaneously adjusts the other two dimensions of the three-dimensional electric stage 22 to collect the input end 5, the Y waveguide chip 6, the front output end 7, For the top-view image of the rear output terminal 8, move the rear camera 13 down to a suitable height, adjust the other two dimensions of the three-dimensional translation stage 22 at the same time, and collect the rear images of the input terminal 5, the Y waveguide chip 6, the front output terminal 7, and the rear output terminal 8. Visual image.

图像处理与控制单元包括台式计算机25及计算机25上的直接耦合程序。根据耦合状态向控制运动控制器24发送信号,实现对一维电动台20、二维电动台21,三维电动台22、第一六维电动台17、第二六维电动台18、以及第三六维电动台19的控制。台式计算机25连接三个相机11,12,13、光功率计26和运动控制器24。直接耦合程序包括:提取Y波导芯片、输入端、前输出端和后输出端的三维角度信息程序,三维角度为俯仰角、偏摆角和偏振角;提取Y波导芯片、输入端、前输出端和后输出端的三维位置信息程序;输出控制三个六维电动台运动的指令输出给运动控制器;在利用相机采集的图像调整输入端、前输出端和后输出端的姿态后,根据光功率计的测量值精确调节输入端、前输出端和后输出端前后、上下位置获取最终的耦合点。The image processing and control unit includes a desktop computer 25 and a directly coupled program on the computer 25 . Send a signal to the control motion controller 24 according to the coupling state to realize the one-dimensional electric table 20, the two-dimensional electric table 21, the three-dimensional electric table 22, the first six-dimensional electric table 17, the second six-dimensional electric table 18, and the third Control of the six-dimensional electric platform 19. A desktop computer 25 is connected to three cameras 11 , 12 , 13 , an optical power meter 26 and a motion controller 24 . The direct coupling program includes: extract the three-dimensional angle information program of the Y waveguide chip, input end, front output end and rear output end, the three-dimensional angles are pitch angle, yaw angle and polarization angle; extract the Y waveguide chip, input end, front output end and The three-dimensional position information program of the rear output end; output the command to control the movement of the three six-dimensional electric stages to the motion controller; after adjusting the attitude of the input end, front output end and rear output end using the image collected by the camera, according to the optical power meter The measured value precisely adjusts the front, back, up and down positions of the input terminal, the front output terminal and the rear output terminal to obtain the final coupling point.

台式计算机25采集左相机11、右相机12、后相机13图像信息,对图像特征识别,如图3所示,执行直接耦合程序。利用右相机12采集的图像识别输入端5端面纤芯、偏振轴和Y波导芯片6偏振角,偏振角识别完成后,控制第一六维电动台17旋转光纤,减小输入端5偏振角和Y波导芯片6偏振角的角度差。利用左相机11采集的图像,识别前输出端7端面纤芯坐标和偏振角,以及后输出端8端面纤芯坐标和偏振角,偏振角识别完成后,结合右相机12识别的Y波导芯片偏振角信息,由第二六维电动台18或第三六维电动台19旋转光纤,减小前输出端7和Y波导芯片6的偏振角的角度差,减小后输出端8和Y波导芯片6的偏振角的角度差。利用后相机13采集的图像识别入端上棱角度、入光点上棱角度、入端侧棱角度和入光点侧棱角度,根据得到的角度差控制输入端5的偏摆和俯仰。同理,利用后相机13采集的图像识别前出端上棱角度、出光点上棱角度、前出端侧棱角度和出光点侧棱角度,根据得到的角度差调整前输出端7的偏摆和俯仰。利用后相机13采集的图像识别后出端上棱角度、出光点上棱角度、后出端侧棱角度和出光点侧棱角度,根据得到的角度差调整后输出端8的偏摆和俯仰。利用后相机13采集的图像识别Y波导芯片6的入光点坐标和入光点侧棱上顶点坐标,综合得到Y波导芯片入光点三维坐标信息,根据输入端5上棱、输入端5侧棱解算输入端耦合点,并结合右相机12采集的输入端5纤芯信息,得到输入端5耦合点三维坐标,计算与Y波导芯片6入光点三维位置偏差,以调整输入端5三维平移。输入端5调整完成后,打开红光光源2,由右相机12观察Y波导芯片出光点上棱,采集Y波导芯片6前出光点和后出光点图像,根据图像信息确定前出光点和后出光点的上下、前后位置,由后相机13采集Y波导芯片6出光点上棱,综合得到Y波导芯片6前出光点、后出光点三维坐标;根据前输出端7上棱、侧棱,解算前输出端耦合点,并结合左相机11采集的前输出端7纤芯信息,得到前输出端7耦合点三维坐标,计算与Y波导芯片6前出光点三维位置偏差,由此调整前输出端7三维平移。同理调整后输出端8三维位移。The desktop computer 25 collects the image information of the left camera 11 , the right camera 12 , and the rear camera 13 , and recognizes image features, as shown in FIG. 3 , and executes a direct coupling program. Use the image collected by the right camera 12 to identify the input end face fiber core, polarization axis, and Y waveguide chip 6 polarization angles. After the polarization angle identification is completed, control the first six-dimensional electric stage 17 to rotate the optical fiber to reduce the input end 5 polarization angles and The angle difference of the polarization angle of the Y waveguide chip 6 . Use the image collected by the left camera 11 to identify the coordinates and polarization angle of the fiber core at the front output end 7, and the fiber core coordinates and polarization angle at the rear output end 8. After the polarization angle identification is completed, combine the polarization of the Y waveguide chip identified by the right camera 12 Angle information, rotate the optical fiber by the second six-dimensional electric stage 18 or the third six-dimensional electric stage 19, reduce the angle difference of the polarization angle of the front output end 7 and the Y waveguide chip 6, reduce the rear output end 8 and the Y waveguide chip The angular difference of the polarization angle of 6. Use the image collected by the rear camera 13 to identify the upper edge angle of the input end, the upper edge angle of the light incident point, the side edge angle of the input end, and the side edge angle of the light input point, and control the yaw and pitch of the input end 5 according to the obtained angle difference. Similarly, use the image collected by the rear camera 13 to identify the upper edge angle of the front output end, the upper edge angle of the light output point, the side edge angle of the front output end, and the side edge angle of the light output point, and adjust the deflection of the front output end 7 according to the obtained angle difference and pitch. Use the image collected by the rear camera 13 to identify the upper edge angle of the rear output end, the upper edge angle of the light-emitting point, the side edge angle of the rear output end, and the side edge angle of the light-emitting point, and adjust the yaw and pitch of the rear output end 8 according to the obtained angle difference. Utilize the image collected by the rear camera 13 to identify the coordinates of the light incident point of the Y waveguide chip 6 and the coordinates of the apex on the side edge of the light incident point, and comprehensively obtain the three-dimensional coordinate information of the light incident point of the Y waveguide chip. Calculate the coupling point at the input end, and combine the fiber core information of the input end 5 collected by the right camera 12 to obtain the three-dimensional coordinates of the coupling point at the input end 5, and calculate the three-dimensional position deviation from the incident point of the Y waveguide chip 6 to adjust the three-dimensional position of the input end 5 panning. After the adjustment of the input terminal 5 is completed, turn on the red light source 2, observe the upper edge of the light emitting point of the Y waveguide chip with the right camera 12, collect the images of the front light emitting point and the rear light emitting point of the Y waveguide chip 6, and determine the front light emitting point and the rear light emitting point according to the image information The upper, lower, and front and rear positions of the point are collected by the rear camera 13 on the upper edge of the light-emitting point of the Y waveguide chip 6, and the three-dimensional coordinates of the front and rear light-emitting points of the Y-waveguide chip 6 are obtained comprehensively; The coupling point of the front output end, combined with the information of the 7 fiber cores of the front output end collected by the left camera 11, obtains the three-dimensional coordinates of the coupling point of the front output end 7, and calculates the three-dimensional position deviation from the front output point of the Y waveguide chip 6, thereby adjusting the front output end 7 three-dimensional translation. Similarly, the three-dimensional displacement of the output terminal 8 is adjusted.

上述图像识别提供的输入端5、前输出端7、后输出端8耦合点的上下、前后坐标精度不能满足直接耦合精度要求,本发明装置进一步依据光功率计26光强大小进行精调。打开宽谱光源1,由光功率计26输出功率大小精调输入端5、前输出端7和后输出端8的上下、前后位置。按照从前到后,从上到下的顺序在边长6um矩形框内,以50nm步距依次调节输入端5、前输出端7和后输出端8,同时由台式计算机25计录光功率计26功率大小,找到功率数值最大时对应的输入端5、前输出端7和后输出端8的位置信息,将输入端5、前输出端7和后输出端8移至最大功率处,固化耦合点,自动直接耦合工序结束。The upper, lower, front and rear coordinate accuracy of the coupling points of the input terminal 5, the front output terminal 7, and the rear output terminal 8 provided by the above-mentioned image recognition cannot meet the requirements of direct coupling accuracy. The device of the present invention further fine-tunes according to the light intensity of the optical power meter 26. Turn on the wide-spectrum light source 1, and finely adjust the up, down, front and back positions of the input terminal 5, the front output terminal 7 and the rear output terminal 8 by the output power of the optical power meter 26. According to the sequence from front to back and from top to bottom, adjust the input terminal 5, the front output terminal 7 and the rear output terminal 8 sequentially with a step distance of 50nm in the rectangular frame with a side length of 6um, and record the optical power meter 26 by the desktop computer 25 at the same time Power level, find the position information of input terminal 5, front output terminal 7 and rear output terminal 8 corresponding to the maximum power value, move input terminal 5, front output terminal 7 and rear output terminal 8 to the maximum power position, and solidify the coupling point , the automatic direct coupling process ends.

上述直接耦合程序中利用后相机13采集的输入端5、前输出端7、后输出端8和Y波导芯片6俯视图、后视图,并由此得到的输入端5、前输出端7和后输出端8上棱角度、侧棱角度、三维坐标和Y波导芯片6入光点上棱角度、入光点侧棱角度、出光点上棱角度、出光点侧棱角度以及Y波导芯片6偏振角的提取,实质均为直线特征识别,其中的坐标提取实际提取直线交点。输入端5、前输出端7、后输出端8三维坐标和偏振角度的识别实质为圆形特征识别。The top view and rear view of the input terminal 5, the front output terminal 7, the rear output terminal 8 and the Y waveguide chip 6 collected by the rear camera 13 in the above direct coupling program, and the input terminal 5, the front output terminal 7 and the rear output terminal obtained therefrom The upper edge angle, the side edge angle, the three-dimensional coordinates of the end 8 and the upper edge angle of the light incident point of the Y waveguide chip 6, the side edge angle of the light input point, the upper edge angle of the light exit point, the side edge angle of the light exit point, and the polarization angle of the Y waveguide chip 6 The essence of extraction is straight line feature recognition, and the coordinate extraction actually extracts the intersection points of straight lines. The recognition of the three-dimensional coordinates and polarization angles of the input end 5, the front output end 7, and the rear output end 8 is essentially circular feature recognition.

针对上述直线特征提取输入图像有如下特征:一幅图像存在一条直线、两条直线或多条直线不同情况;存在多条直线时,其相对方位固定;直线角度变化很小,但直线位置变化较大。为了提高装置的鲁棒性,本发明直接耦合程序中采用了自适应滑窗法,如图4所示,具体为:设置窗口大小与滑窗步距的初始值,滑动窗口,切割得到子图像,用Candy算子提取子图像边缘,采用迭代最小二乘法拟合直线方程,满足角度限定条件的直线才会被输出,若在限定的循环次数中不能找到预期直线,改变窗口大小和滑窗步距,重新搜索直线。本发明根据图像特征采用了滑窗法对直线特征提取,采用迭代拟合的最小二乘法优化直线边缘,实现了图像中多实现目标、高精度的提取。The input image for the above straight line feature extraction has the following characteristics: one image has one straight line, two straight lines or multiple straight lines; when there are multiple straight lines, their relative orientation is fixed; the angle of the straight line changes very little, but the position of the straight line changes relatively big. In order to improve the robustness of the device, the self-adaptive sliding window method is adopted in the direct coupling program of the present invention, as shown in Figure 4, specifically: setting the initial value of the window size and the sliding window step distance, sliding the window, and cutting to obtain sub-images , use the Candy operator to extract the edge of the sub-image, use the iterative least squares method to fit the straight line equation, the straight line that meets the angle limit condition will be output, if the expected straight line cannot be found in the limited number of cycles, change the window size and sliding window step distance, and search for the straight line again. The invention adopts the sliding window method to extract the straight line feature according to the image feature, and adopts the least square method of iterative fitting to optimize the straight line edge, so as to realize the extraction of multi-objective and high-precision in the image.

针对上述光纤端面图像噪声较大的特点,本发明采用抗干扰性强的随机圆检测算法提取纤芯坐标和两个熊猫眼轮廓。如图5所示,计算机25读入相机采集的一帧图像,首先采用Canny算子提取图像边缘,随后从边缘图像中随机抽取4个点,利用其中3个点构造圆形,验证第4个点是否在所构造的3个圆形上,若不在则重新取样;若在,则验证其余边缘点中在构造圆上点的个数,若点的个数满足限定条件,则构造圆形为真实圆,否则重新取样。从图像中检测到3个圆后,将半径最大的圆的圆心作为纤芯坐标,两个小圆的连心线作为偏振角。本发明采用随机圆检测算法提取光纤纤芯坐标和偏振角,相比传统的Hough变换抗干扰强。Aiming at the characteristic that the image of the optical fiber end face is relatively noisy, the present invention adopts a random circle detection algorithm with strong anti-interference to extract the coordinates of the fiber core and the contours of two panda eyes. As shown in Figure 5, the computer 25 reads in a frame of image collected by the camera, first uses the Canny operator to extract the edge of the image, then randomly selects 4 points from the edge image, uses 3 of them to construct a circle, and verifies the fourth point Whether the point is on the three constructed circles, if not, resample; if yes, then verify the number of points on the construction circle among the remaining edge points, if the number of points meets the limiting conditions, then the construction circle is True circle, otherwise resample. After three circles are detected from the image, the center of the circle with the largest radius is taken as the fiber core coordinates, and the line connecting the two small circles is taken as the polarization angle. The invention adopts a random circle detection algorithm to extract the coordinates of the fiber core and the polarization angle, and is stronger in anti-interference than the traditional Hough transform.

随后,人机交互单元包括台式计算机25及用户操作界面,界面接受操作者键盘、鼠标事件输入,控制直接耦合装置的操作工序,实时显示相机图像和光功率大小,实现对Y波导芯片自动直接耦合装置的控制与耦合质量在线监测。Subsequently, the human-computer interaction unit includes a desktop computer 25 and a user operation interface. The interface accepts input from the operator's keyboard and mouse events, controls the operation process of the direct coupling device, displays the camera image and optical power in real time, and realizes automatic direct coupling to the Y waveguide chip. On-line monitoring of control and coupling quality.

Claims (9)

1. a kind of automatic direct-coupling device of Y waveguide chip based on image recognition and optical power feedback, which is characterized in that including Optical path unit, image acquisition units, Motor execution unit and image procossing and control unit;
Including Y waveguide chip to be coupled, input terminal, preceding output end, rear output end and fiber optic loop in the optical path unit, and The optical power size that light power meter measurement input terminal returns is set;
The Motor execution unit includes:For fixing the Y waveguide fixed mechanism of Y waveguide chip, the one-dimensional of left camera is set up Motorized stage sets up the two-dimentional motorized stage of right camera, the three-D electric platform of camera after erection, respectively control signal, preceding output end With the three sextuple motorized stages and motion controller of rear output end posture;Motion controller is electronic to one-dimensional motorized stage, two dimension The sextuple motorized stage of platform, three-D electric platform and three sends attitude control signal;
The image acquisition units include right-angle prism, three cameras, three Light-emitting diode LED and the network switch;Three A camera is located at the left side, right side and rear side of Y waveguide chip, and horizontal positioned, is respectively labeled as left camera, right phase Machine and rear camera;Three LED respectively with shaft axis of optic fibre at 30 degree of deflection oblique illumination input terminals, preceding output end and rear output End;Right-angle prism is installed on the upper cover bottom surface of Y waveguide fixed mechanism;The network switch for three cameras and desktop computer it Between image transmitting;
The image procossing and control unit includes computer and direct-coupling program;The computer connects three phases Machine, light power meter and motion controller;The direct-coupling program includes:Extract Y waveguide chip, input terminal, preceding output end With the three-dimensional perspective and three-dimensional position of rear output end, the instruction for controlling three sextuple motorized stage movements is exported to motion control Device;After the posture using the Image Adjusting input terminal of camera acquisition, preceding output end and rear output end, according to the survey of light power meter Magnitude adjusts input terminal, preceding output end and rear output end and obtains final Coupling point.
2. the automatic direct-coupling device of Y waveguide chip according to claim 1, which is characterized in that the optical path unit Including wide spectrum light source, red-light source, first annular device, the second circulator, input terminal, Y waveguide chip, preceding output end, rear output End, fiber optic loop and light power meter;Wide spectrum light source is connected with the input terminal of first annular device, and red-light source is returned with first annular device End is gone back to be connected;The input terminal of second circulator connects the output end of first annular device, and input terminal is connected to the defeated of the second circulator Outlet;Light power meter is connected to the return terminal of the second circulator.
3. the automatic direct-coupling device of Y waveguide chip according to claim 1, which is characterized in that the motion control Device includes programmable logic controller (PLC) and stepping trapezoid program;Motion controller uses time-sharing multiplexing technology, by 6 motorized stages 24 spindle motors are divided into four groups, and 6 dimensions of every group of control control 6 dimensions using 6 road pulse interfaces of programmable logic controller (PLC) Degree;Stepping trapezoid program includes the reception of instruction, the understanding of instruction, buffer state identification, pulse output and pulse output shape State monitoring.
4. the automatic direct-coupling device of Y waveguide chip according to claim 1, which is characterized in that the Image Acquisition Unit, when opening three LED, left camera acquires the end face figure like of preceding output end and rear output end, and right camera acquires input terminal End face figure like and Y waveguide chip go out rib image on luminous point, closing three LED, when opening red-light source, right camera acquisition The preceding luminous point out of Y waveguide chip and rear dot pattern picture out;The rear camera is under the drive of three-D electric platform, acquisition input End, the backsight image of Y waveguide chip, preceding output end and rear output end and the top view image by right-angle prism reflection.
5. the automatic direct-coupling device of Y waveguide chip according to claim 1 or 4, which is characterized in that at the image Reason and the direct-coupling program in control unit, Image Adjusting input terminal, preceding output end and the rear output end acquired using camera Posture, specifically include:
Image recognition input terminal end face fiber core, polarization axle and the Y waveguide chip angle of polarization acquired using right camera, control clamping are defeated Enter the sextuple motorized stage spin fiber at end, reduces the differential seat angle of the input terminal angle of polarization and the Y waveguide chip angle of polarization;
Utilize output end end face fiber core coordinate and the angle of polarization before the image recognition of left camera acquisition, and rear output end end face fiber core Coordinate and the angle of polarization, the Y waveguide chip identified in conjunction with right camera polarize angle information, and control clamps preceding output end or rear output end Sextuple motorized stage spin fiber, the differential seat angle of the angle of polarization of output end and Y waveguide chip before reducing, output end and Y wave after reduction Lead the differential seat angle of the angle of polarization of chip;
Enter to hold upper angularity using the image recognition of rear camera acquisition, enter angularity on luminous point, enter end side angularity and enter luminous point Incline angle adjusts beat and the pitching of input terminal;Utilize angularity, out luminous point in outlet before the image recognition of rear camera acquisition Upper angularity, preceding outlet incline angle and luminous point incline angle out, the beat of output end and pitching before adjusting;It is adopted using rear camera Angularity in outlet after the image recognition of collection goes out angularity on luminous point, rear outlet incline angle and luminous point incline angle out, adjustment The beat of output end and pitching afterwards;
Enter luminous point coordinate using the image recognition Y waveguide chip that rear camera acquires and enter apex coordinate on luminous point incline, obtains Y wave It leads chip and enters luminous point three-dimensional coordinate, according to rib, incline on input terminal, resolve input terminal Coupling point, acquired in conjunction with right camera defeated Enter to hold fibre core information, obtain the three-dimensional coordinate of input terminal Coupling point, calculates and Y waveguide chip enters light spot position deviation, with adjustment Input terminal D translation;
After the completion of input terminal adjustment, red-light source is opened, go out luminous point before acquiring Y waveguide chip by right camera and goes out dot pattern afterwards Picture, go out before being determined according to image luminous point and it is rear go out luminous point up and down, front-rear position, Y waveguide chip light-emitting point is acquired by rear camera Upper rib, the comprehensive three-dimensional coordinate for obtaining going out luminous point before Y waveguide chip, going out luminous point afterwards;According to rib, incline on preceding output end, resolve Preceding output end Coupling point, and the preceding output end fibre core information of left camera acquisition is combined, the three-dimensional of output end Coupling point is sat before obtaining Mark goes out luminous point three-dimensional position deviation before calculating and Y waveguide chip, output end D translation before adjusting;Similarly, output end after adjustment Three-D displacement.
6. the automatic direct-coupling device of Y waveguide chip according to claim 5, which is characterized in that the direct-coupling Program, upper angularity, incline angle, three-dimensional coordinate and the Y waveguide chip for extracting input terminal, preceding output end and rear output end enter light Angularity, the angle of polarization enter luminous point incline angle, go out angularity on luminous point, going out luminous point incline angle and Y waveguide chip on point, It is using extraction of straight line method;The extraction of straight line method utilizes the minimum of iteration using adaptive sliding window method Square law fitting a straight line equation.
7. the automatic direct-coupling device of Y waveguide chip according to claim 5, which is characterized in that the direct-coupling Program extracts the three-dimensional coordinate and polarization angle of input terminal, preceding output end, rear output end, is using circular feature extracting method; The circular feature extracting method is random loop truss algorithm.
8. the automatic direct-coupling device of Y waveguide chip according to claim 1, which is characterized in that the computer root It is walked according to light power meter output power size according to sequence from front to back, from top to bottom in side length 6um rectangle frame with 50nm Away from input terminal, preceding output end and rear output end is successively adjusted, find corresponding input terminal when magnitude of power maximum, preceding output end and The position of output end afterwards, as final Coupling point.
9. the automatic direct-coupling device of Y waveguide chip according to claim 1, which is characterized in that the device also wraps Man-machine interaction unit is included, for the operational sequence of user's control direct-coupling device, real-time display camera image and optical power are big It is small, coupling mass is monitored on-line.
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